Cutter-head.



A. B. LANDIS.

GUTTER HEAD.

Arrmonlon FILLED Nov. zo, 1909.

Patentod Feb.`20, 1912.

3 SHEETS-SHEET 1.

A. B. LANDIS.

CUTTER HEAD. APPLICATION HLED 11057.20, 1909.

` Patented Feb. 20, 1912.

3 SHEETS-SHEET Z,

l|||||||l|r I fvg.

ABRAHAM B. LANDIs, or WAYNEsBoRo, PENNSYLVANIA.

CUTTER-HEAD.

Specication of Letters Patent.

Patented Feb. 2o, 1912.

Application led November 20, 1909. Serial No. 529,152.

To all whom 'it 'may concern:

Be it known that I, ABRAHAMy B. LANDIS, a citizen of the United States,'residing at Waynesboro, in the county of Franklin and State of Pennsylvania, have invented certain new and useful Improvements in Cut-y ter-Headsof which the following is a specication.

My said invention consists in various improvements in the details of construction and arrangement of parts of cutter-heads for cutting threads on bolts, screws, etc., whereby such a head 'is provided the parts of which may be easily and quickly assembled, or separated, and adjusted in relation to each other, without the employment of tools, and also wherein all of the parts are held rigidly and securely during operation, all as will be hereinafter more fully' described claimed.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, Figure 1 is a front elevation of a cutter-head embodying my said improvements, Fig. 2 a longitudinal section through the same on the dotted line 2-2 in Fig. 1, except that one side of the rim is shown in elevation to better illustrate the positionJand arrangement of the die adjustlng device, Fig. 3 a detail plan view of the face of the ri'rn at the point of the location of said adjusting device, Fig. 4 an end'view of a cutter-holder partly in elevation and partly in section, Fig. 5 a View of onel side of a cutter-holder, Fig. 6 an underside plan and ` view of the cutter-holder, Fig. 7 a rear elevation of the cutter-head showing a portion broken away to illustrate the means for adjustingthe device for securing the cutteri holders in place more clearly, and Figa-8,

9, 10, 11,' 12 and 13 detail views showing parts of the apparatus separately.

In saidv drawings the portions marked A represent the main body or frame of the cutter-head, B the adjusting part for opening and closing the die, C the cutter-holders,

andD the spindle of the machineon which said cutter-head is mounted.

vAs in several of my former applications, the. body A is a casting of suitable size and p dimensions for the purposeintended, preferably formed with a central perforationv and Shaving a series of perforations arranged equi-distant around its axis and formed to constitute journal bearings for the trunnions of the cutter-holders. The rear end of said body A is adapted to be secured on the end of the spindle D of the machine in any approved manner.

The part B is in the form of a sleeve surrounding said body A and adapted to have a limited longitudinal movement thereon, said movement being limited in one direction by the annular flange a surrounding the rear rend of the body A. A circumferential groove Z) is formed in said part B for the engagement of 'a shifting fork (not shown)- for sliding said part in the usual manner. The forward end of said part B projects beyond the forward end of the body A and is also of a larger diameter than said body, being -of a size adapted to surround thec'utter-holders, as shown. On its interior face it is formed w1th a serles of bosses B arranged equ1- distant from each other and containing radial perforations adapted to carry the adjustable seats b5 for the outer ends of the toggle-levers C2, which support the outer ends of the cutter-holders. Said seats o my applicationtNQ. 514,793, filed August 26, 1909, each being supported against a screwthreaded part carried in a rotary sleeve `having teeth on its outer 'surface with which. teeth on the inner edge of a flange b on rin B are adapted to engage. Said ring B is set into a recess in the outer corner of the inside face ofthe rim of part B with the toothed flange b propecting through suitable segmental recesses to engagel with'the teeth on said adjusting sleeves. l

A inion B2 is mounted in a'radial perforatlonin the rimofpart B being secured by a nut b2 on its inner end and a flange on vfor the cutter-holders are of substantially the same ,form andarrangement as shown in.

its outer end and its teeth engage with the teeth of said flan b. The outer end of said pinion is provi ed with turning wings b3 by'whicl it may be readily "turnedby hand,

-said wingsbeing set into a counter-sunk recessin the base ofthe rim of part B, as

shown most clearly in Figs.A 1, 2 and 3. By

termined by a scale shownon the edgeI thereof, as indicated in Fig. 3. An indicator point p is formed on the rim of part B by which the degree of adjustment may be readily seen. By this means the size of the dieA may be quickly and conveniently regulated byadjusting the position of the seats for the outer ends of the toggle-levers as will be readily understood.

The cutter-holders C are of substantially the form best shown in Figs. 4, 5 and 6 being formed with'trunnions C adapted to be journaled inthe bearings formed therefor in' the body A. The rear en d of each trunnion lis formed with a circumferential groove c with which projecting iianges of an oscillating locking-plate c are adapted to engage. Said locking-plate c is set into a recess in the rear end of body A and is.`Y formed with semi-circular notches of a size to readily permit the end of the trunnion C to pass through. It is formed with a V- shaped notch c2 in one edge and segmental slots c3 and c4 in Opposite sides. Screws c and c extend through said segmental slots j into the end of body A and hold said plate in position. A coiled spring cq is inserted between one of said screws and the opposite end of the slot through which it extends andtends to turn and hold said locking-plate with' the edges of its recesses engaged'with the circumferential grooves c in said trunnions. A screw c8 with agconical point is .inserted in a radial screwthreaded perforation in body A with its conical end adapted to seat in the conical notch c2 in one edge of said plate o. By

turning said screw inward until its point seats in the point of said recess, said plate will .be lturned so that the curved edges lof its notches will Vcoincide with the' circumference of the trunnions C when said trunnions may be slid to position or removedk from the head. By backing said screw out to the position indicated in Fig.

' 7 the spring c" `will.automatically turn plate C -so that its edges will engage with thek Asupported in the adjustable seat mounted in a boss B of the part B. A chaser C3 is -mounted in each of said cutter-holders nand is of a form best shown in Figs. 5 and 12. The recess in the cutter-holderfor receiving said chaser is open on the outer edge and has a liange 09 at its inner edge adapted to project partly over'the outer face of the inner edge of said chaser, which is formed with a correspondingly tapered portion extending nearly to said inner edge.' From said tapered portion to said edge the face is formed at right angles with said inner edge or par allel with the back of the chaser, as best shown in Fig. 5. A space is left between the horizontal part of flange c and the horizontal part of the chaser C3, the bearing between said parts being on the angle only. In the back of said chaser is'formed a longitudinal groove formed with tapered sides but with the bottom or outer side of the groove at a short or abrupt angle, nearly parallel with the inner edge of the chaser. A socket lt is formed to extend at an angle back from near the front side of the holder in which is mounted a plunger C the inner ,end of which is formed with a holding tongue 10 of a form corresponding to the forni of the groove in the back of the chaser. The rear face of said tongue, with the'sharp angle, being adapted to bear against the sharp angle of said groove, the formation of the' tongue being such that the engagement between said sharp angles will hold said plunger from contact with the chaser at other points, as shown most clearly in Fig. 5, the bearing being solely on the short angle between the tongue and the groove. A heavy coiled-spring C6 is mounted between a screw-plug 12 in the outer end of the socket and said plunger and serves to force said plunger firmly against said chaser, which, the bearing being upon said short angle, tends to force said chaser toward the backside ofthe recess and at the same time clamp it firmly between said plunger and the angle of the flange c, thus holding it securely in position. A. screw 20 is mounted in a longitudinal recess in said cutterholder and is adapted to engage with screwthreads on the backof the chaser, by which said chaser maybe adjusted longitudinally.

The 'outer end of said screw- 20 1s provided with a knurled nut or sleeve 21 by which it may be readily turned by hand. It is 1nserted' in the recess. in the cutter-head from the front side; its smaller end being pro.

C4, being held from longitudinal movement` therein by a pin 25 inserted in a pin-hole extending transversely thereof and engaging with a circumferential groove therein. Said cylinder is formed with a radial tooth or projection 26 adapted to engage with a ply lifting the lever 27 cylinder 24; will be turned and plunger C5 raised so that the pressure of the spring against the shoulder in chaser C3 will be relieved when said chaser may be readily adjusted by turn-- ing the screw 2O through the sleeve 21 thereon. By this means the chaser is not,

only held in position without other clamping means than that shown, but is held in a manner to leave the front side of the cutterholder open and so as to be readilyadjusted or manipulated without the use of hand tools. y

I have also shown substantially the same character of oiling arrangement as shown in my application No. 514,793, above referred to, consisting of'a longitudinal perforation extending centrally through the trunnion of each cutter-holdery and communicating with a channel l which in turn communicates with an annular oil chamber d around the spindle D. The inner end of the per# foratlon extends to the outer end of the cutter-holder but its extreme outer end is plugged and a transverse perforation 30 leads therefromdirectly onto the end of the Chaser, so that the oil flows constantly directly on the point of cutting, and serves not only to keep the workxthoroughly lubricated but also to wash away the cuttings and keepl the work clean at this point. Y

The operation of the device will be readily understood from the foregoing description, the operation of each feature having been previously described. It-may be briefly recapitulated, however, as follows: The parts are assembled in the well known manner vthe screw G8 properly a and as shown in the principal figures of the drawings. The holding late C is held by justed so that the trunnion of 'the cutter-holders may be slid to position. Said screw o8 is then backed out as shown in Fig. 7, when the spring c7 turns the holding plate to engage the edges of its recesses with the circumferen'ial he chasers are mounted in position and the outer seats for the tog le-levers are ladjusted to secure the size o die desired. The' die is opened and closed by sliding the part B longitudinally upon the body A in the well known or any approved manner. `The chasers are held in position by the means above described and when their adjustment is desired it is readily effected by merely raising the lever 27 slightly and turning the screw 20 in the direction necessar l, to secure the desired' adjustment. fected through the annular chamber d being supplied from any `source through a pipe d2,

The oi ing is ef-v andlowing through the channels shown and y described to the point of cutting.

Under the rules of pract1ce a cross referv ence is made to my co-pending application No. 534,229.

Having thus fully described my said invention, what I 'clalm' as new and desire to secure by Letters Patent, is:

l. In a cutter-head the combination of the frame containing a series of cutter-holders mounted on trunnions in bearings around its axis, said cutter-holders, a sliding part mounted on said frame carrying seats, toggle-levers mounted at one end in seats in the outer end of said cutter-holders and at the other end in said .seats in said sliding part, means for adjusting said seats in said sliding part radially comprising a ring engaging with each of saidseats and adapted to be turned by means of a pinion mounted in a radial perforation in said sliding part, and said pinion provided with wings on its outer end for turning the same, substantially as set forth.

' 2. 'In a cutter-head the combination of the body or frame, cutter-holders pivotally mounted therein, cutters carried by said holders, a sliding part on said body or frame, adjustable seats carried by said sliding part,`toggles inserted between said cutter-holders and said adjustable seats, a ring engaging said adjustable seats, and means' for turning said ring consisting of a pinion mounted in a radial seat in said sliding part and formed in its outer end with wings seated in a oouriter-sunk socket in the Vrim of said sliding part, said ring and the rim of said sliding part being formed with an indi.- cator and scale for determining the degree of adjustment, substantially as set forth.

3. In a cutter-head the combination ofthe body or frame, the cutter-holders mounted onl trunnions, said trunnions mounted in perforations in said base or frame each formed with' a circumferential groove, a lockingplate formed with notches adapted to embrace said trunnions and engage with said grooves, means for normally holding said `plate into engagement with` said grooves, and means for turning said plate and holding it outof engagement with said grooves, vsubstantially as set forth.

4. In a cutterhead the combination of the base or frame frmed withseats or bearings for the cutter-holders, cutter-'holders formed with. trunnions mounted in said bearings,

to embrace the ends of the trunnions and Y engage with said grooves, a spring for normally holding the ends of said notches into engagement with said grooves, and a conical screw adapted to engage with a conical recess in the edge of said` plate for turning and holding it .out\\hf engagement with said grooves, substantiall as set forth.

5. In a cutter-hea thel combination of the body o'r fra-me, cutter-holders mounted in said .body `or frame formed with trunnions adapted to` turn in their seats or bearings, means for holding and adjustingsaid cutterholders, each of said cutter-holders being formed with a recess in its face to receive the Y chaser, said recess being formed with an overhanging ange on its inner edge having a tapered face, a chaser mounted in said recess and also formed with a correspondingly tapered face adapted to bear upon the tapered face of said flange and with a longitudinal groove in its back formed with tapered sideslthe backside being at a sharp angle, and a .plunger mounted in a suitable socket in said cutter holder and formed with atongue on its inner end adapted to engage with and bear against the short angle lof 4 said groove, substantially as set forth.

spring pressed plunger mounted in a socket in said holder and formed with a tongue on its inner end adapted to engage with said groove, said tongue being also formed with a tapered edge adapted to bear against the tapered face of said groove and force' said chaser back into the recess and against the tapered face of'said flange on said holder, substantially as set forth. l J

7.' A cutter-head comprising a body or 'frame carrying cutter-holders, means for adjusting and securing said cutter-holders,

recess, and a vrocking part having a tooth,

each of said cutter-holders being formed with. a recess .to receive and retain the f chasers formed with an overhanging flange at its inner edge with-a -taperedbearing face, a chaser mounted in said recess formed with af'coriespondingly tapered face and with a longitudinal groove in its back with tapered edges, a spring mounted plunger with a correspondinglyA tapered `'tongue adapted'to engage with said longitudinal engaging with the notch in said plunger, and a. lever connected with said part for rocking it and lifting said. plunger out of Y. engagement with said recess, substantially as set forth.

8. `A cutter-holder for cutter heads formed with a recess to receive the chaser having f an over-hanging flange with a tapered bearing face, a socket for a holding ying tapered ange, a cutter mounted therein .with a lcorrespondingly 'tapered face 'adapted to engagey a bearing upon said flange and formed with a longitudinal groove in its back with tapered faces, a plunger with a tapered tongue to engage said groove, means for forcing said plunger into engagement therewith, means for lifting said plunger out of engagement, and means for -adjusting 'said chaser in its seat, substantially as set forth.

10. A vcutter-holder for cutter-heads formed with a recess to` receive the chaser, said chaser mounted therein and formed with a longitudinal groove in its back with tapered sides, and a holding automatically pressed plunger with a tapered tongue on its inner end adapted to engage with said groove and force said chaser into its seat in said recess, substantially as set forth.

11. A cutter-head comprising cutter-holders each of Which is formed with a recess for the cutter, said cutters mounted in said recesses each formed with longitudinal grooves in their backs with tapered faces, a plunger in each cutter-holder formed with a tapered tongue engaging with the groove of its cutter, means for holding said plunger into engagement with said groove with its rear face only bearing against the rear side of saidgroove-said rear face being adjacent to the holding edge of the recess, andmeans for adjusting said several parts, substantially as set forth. 12. A chaser for cutter-heads formed with a tapered shoulder on its front side near itsA rear edge adapted to .bear against a corresponding shoulder in a holder and with a tapered groove in its rear face adapted to engage with a tapered holding device arranged to force it against said tapered face, substantially as set forth.

`13. A cutter-holder for cutter-heads formed' with 'a'recess to receive the chaser havlng an over-hanging flange with a tapered face at its outer edge, a chaser mounted in said recess formed at its inner edgewith parallel back and front faces for a short distance and with a tapered face extending 'at an angle a distance from the inner edge of its face to bear upon the angle of said over-hanging flange and with a longitudinal groove in its back formed with tapered sides the rear side of which is formedy at a sharp angle to serve as the bearing face, a plunger mounted in n. socket ing at a shar 15 the and formed with a tongue on its inner' end formed with Iangular faces the rear face beangle and adapted to 'bear against the s arp angle in the groove in the back of said chaser, and means for holding said plunger under pressure against said Chaser, substantially-as seh frth. 14. In a cutter-head the "combination of thev body or y frame, the cutter-holders 10 mounted therein, cutters in 'said' cutter- \ho1ders,'meanslfor adjusting said cutterholders, and an oilin device comprising channels extending tlrough said cutterholders and extendmg to points adjacent to oints of the cutters, substantially-as set orth.

15. An oiling device for cutter-heads said holders to discharge-at the Foint of the cutz5 comprising an annular oilghainber-adjaeent to said cutter-head, the @guter-holders with channels communicating'i:-therewith and 2@ leading through said lcutter-holders to the outer ends thereof wheredthey are formed with. transverseperforatins leading from channels `t through said cutter-` ting, substantially as set orth. A

In witness whereof, -I have hereunto set myhand and seal at Washington, D. C., this 18th day of November, A. D. nineteen hundred`and nine.l

' ABRAHAM B. LANDIS. [L. s.] Witnesses:

J.D. YOAKLEY, E.- W.'l Bnanmnn. 

